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The p-Block Elements

Short Answer Type

521. Write the balanced equation for complete hydrolysis of XeF₆.

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522. Predict the shape of ClF₃ on the basis of VSEPR theory.

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523. In which one of the two structures, NO₂^– and NO₂^–, the bond angle has a higher value?

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524. Which is a stronger acid in aqueous solutions, HF or HCl?

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525. Why is the bond angle in PH₃ molecule lesser than that in NH₃ molecule?

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526. Why does the reactivity of nitrogen differ from phosphorus?

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527. Why does NH₃ form hydrogen bond but PH₃ does not?

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528. How is nitrogen prepared in the laboratory? Write the chemical equations of the reactions involved.

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529. How is ammonia manufactured industrially?

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530. Illustrate how copper metal can give different products with HNO₃.

Concentrated nitric acid is strong oxidizing agent.
The product of oxidation depend on the concentration of acid, temperture and also the material undergoing oxidation.
Two condition aries :
On heating with dilute nitric oxide NO evolved or on reacting with concentrated nitric acid NO₂ is evolved.

reaction with dilute nitric acid 3 Cu + 8 {HNO}_{3} (dil) \to 3 Cu ({NO}_{3})_{2} + 4 H_{2} O + 2 NO Reaction with concentrated nitric acid Cu + 2 {HNO}_{3} (conc .) \to Cu ({NO}_{3})_{2} + 2 H_{2} O + 2 {NO}_{2}

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Previous Year Papers

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Test Yourself

Short Answer Type

530. Illustrate how copper metal can give different products with HNO3.

530. Illustrate how copper metal can give different products with HNO₃.